At \(Nt \approx \pi \) , the wake transitions to the NEQ stage wherein \(U_d\)  exhibits a slower decay compared to both the preceding stage and the following stage which commences at \(Nt \approx 15\) . Fitting a power law to the NEQ stage results in wake decay with \(x^{-0.266}\) . This decay is close to the -1/4 decay in the NEQ regime found in the experiments of [1]} and later in numerical simulations [2]}, [3]}, [4]}, [5]}. At \(Nt\approx 15\) , the spheroid wake transitions to the Q2D regime with a sharper decay and a power-law fit results in \(U_d \sim x^{-0.72}\) , which is close to the \(x^{-0.75}\)  behavior established by [1]} for the Q2D regime. The \(\mbox{\textit {Fr}}= 2\)  disk wake shows a very different behavior. Until at least \(x = 125\)  (\(Nt = 62.5\) ) – the full extent of the computational domain – the disk wake exhibits no transition to the Q2D regime. Instead, after transitioning to the NEQ regime with a power law of \(U_d \sim x^{-0.18}\) , the disk wake stays in that regime.
